Dry Processing Equipment

The second stage of coffee processing after wet processing is the dry processing. Dry processing consists of the parchment coffee or dry cherry coffee, being processed to reveal the ultimate coffee bean, ready for roasting. The many stages of Dry processing involve, a Pre Cleaner, Destoner, Hulling machines, Densimetric grading, Size grading and final sorting.

Dry Processing Equipment

Eco Pulper (Disc Type) for Coffee

McKinnon Eco Pulpers (Disc Type) are used in wet processing plants to pulp ripe coffee cherry to
parchment. The ripe coffee cherry is fed from fruit tanks through cherry feeder and stone catcher
arrangement and wet parchment is discharged in to fermentation tanks. The water is recovered and
recirculated.

McKinnon Eco Pulpers can be used for Arabica and Robusta varieties. They are made with one, two, three
and four discs according to the capacities required. The Eco Pulper can be configured with rigid or
flexible chop rail option. The pulping operation takes place due to the rubbing actions between bulbs on
the disc and the Chop rails. The gap between surface of the bulb and the chop rail can be adjusted to
allow for any clearance that may be required according to the variety and size of ripe coffee cherry
processed. The hopper is fitted with a feeding mechanism which ensures uniform feeding of the ripe
coffee cherry to the disc surface.

McKinnon Eco Pulpers require minimum amount of water for pulping and the water can be recirculated for
reuse after filtering of skins. Screw Conveyor is provided to transport skin from pulper to skin yard.
Two pumps are also provided to recirculate the transport water to syphon tank and pulped water to disc.
McKinnon Eco Pulper can be run with electric motor or diesel engines and have a capacity of 1000 kgs of
ripe coffee cherry intake per hour per disc.

McKinnon Eco Pulper can be used in conjunction with Aagaard pregraders, Rotary sieves and shaking
sieves.

Technical Specifications

Description

Power Required in HP

Input Capacity Ripe Cherry in kg / per hour

M/c Nett Weight in kg

M/c Gross Weight in kg.

Shipping Volume in Cu. Mtrs.

1 Disc Eco Pulper

5

900 – 1000

425

475

2.15

2 Disc Eco Pulper

6

1850 – 2000

460

600

2.50

3 Disc Eco Pulper

7

2800 – 3000

730

930

2.75

4 Disc Eco Pulper

9

3800 – 4000

800

1000

3.50

Specifications subject to change

Disc pulper for coffee

McKinnon Disc Pupler is used in wet processing plants to pulp ripe coffee cherry to parchment. The
coffee is fed from fruit tanks and the wet parchment is discharged into fermentation tanks. The
water is recovered and recirculated.

McKinnon Disc Pulpers can be used for Arabica and Robusta varieties. They are made with One, Two,
Three and Four Discs, according to the capacities required. The Single Disc Pulper can be manually
operated with a short leg option. The Disc Pulpers can be configured with Rigid Chop rail or
Flexible Chop rail option. The pulping operation takes place between the rubbing action of the bulbs
on the disc and the chop rails. The gap between the surface of the bulb and the chop rail can be
adjusted to allow for any clearance that may be required according to the variety and size of the
coffee cherry processed. The hopper is fitted with a feeding mechanism which ensures even feeding of
the ripe coffee cherry to the disc surface.

McKinnon Disc Pulpers require minimum amount of water for pulping and the water can be recirculated
for reuse after filtering of skins. Disc pulper can be run with Electric Motors or Diesel Engines
and have capacity of 1000 kgs of ripe coffee cherry intake per hour per disc.

McKinnon Disc Pulpers can be used in conjunction with Cherry Feeders, Aagaard Pregraders, Rotary
Sieves and Shaking Sieves.

Technical Specifications

Description

Power required in HP

Input Capacity Ripe Cherry in kg / Hr

M/c Nett Weight in Kg.

Gross Weight in kg.

Shipping Volume in Cu. Mtrs.

1 Disc Pulper

1

850 – 1000

275

325

1.15

2 Disc Pulper

2

1700 – 2000

310

450

1.50

3 Disc Pulper

3

2550 – 3000

580

780

1.75

4 Disc Pulper

5

3400 – 4000

650

850

2.50

Specifications subject to change

Green Cherry Separator

The McKinnon “Green Cherry Separator” machine has been designed to Segregate Green cherry from Ripe
cherry fruits at in-put.
Principle of Operation: Coffee fruit enters into the central conveyor which will move
the coffee fruit left side and right side simultaneously. Meanwhile ripe fruit will escape through the
surrounding sieve due to squeezing property and falls down to the collection tray which leads the fruit
to the pulper. Green Cherry will be collected at a separate outlet.

Technical Specifications

Description

Input Capacity of Ripe Cherry in kg / hr

Power required in Hp

M/c Nett weight in kg.

Gross weight in kg.

Shipping Volume in Cu.mtrs

GBS 1

3500-4000

7.5

375

500

2.6

GBS 2

900-1000

5

125

185

1.2

Specifications subject to change

Disc Pulper for Coffee

The McKinnon Disc Pulper is used in wet processing plants to pulp ripe coffee cherry to parchment. The
coffee is fed from fruit tanks through cherry feeder and stone catcher arrangement the wet parchment is
discharged into fermentation tanks. The water is recovered and recirculated.
The machine can be used for Arabica and Robusta varieties. Disc pulper can have between one to four disc
depending on the capacities required. The Single Disc Pulper can be manually operated with a short leg
option. The Disc Pulpers can be configured with a rigid chop rail or a flexible chop rail. The pulping
operation takes place between the rubbing action of the bulbs on the disc against knife fitted in the
chop
rail. The gap between the bulbs and the chop rail can be adjusted according to the variety and size of
the
cherry. The hopper is fitted with a feeding mechanism that ensures even feeding.
The machine requires minimum amount of water, which can be recirculated for reuse. The machine can run
on an
Electric Motor or a Diesel Engine, with a capacity of 1000kgs of ripe cherry / per disc/ per hour.
McKinnon Disk Pulper can be used in conjunction with Aagaard pre graders, Rotary sieves and shaking
sieves

Aagaard Wet Processing System

McKinnon Aagaard Wet Processing System has been designed to produce a uniform quality of First Parchment
and for total pulping of the intake ripe coffee cherry.

The system consists of the following equipments :
Rotary Cherry Feeder to intake ripe coffee cherry from the fruit tank, a device to destone the ripe
coffee cherry and to evenly spread the cherry. This feeding system is not dependent on water and hence
less water is needed in the pulping process. A regulating door ensures that the feeding can be varied
from 800 kgs to 4000 kgs per hour.

A Primary Disc Pulper can be Two, Three or Four Disc type depending on the capacities required. These
pulpers are fitted with hoppers. The flexible Chop Rail option ensures that a wider range of cherry
sizes is pulped with reduced nip damage. Sixteen nylon fingers, backed by a flat piece of rubber with a
tension adjusting screw, ensure this flexibility.

Aagaard Pregrader, consisting of a wet sieving surface and a paddle elevator, ensures the separation of
wet parchment into firsts, seconds and lights. The firsts are discharged into a separation chamber for
paddle elevation to fermentation tanks while the seconds and lights are led to the Repasser Pulper. The
Pregrader produces a first grade of well pulped and uniform size parchment, completely free from skins
and helps grade the coffee for future dry processing. A Repasser Disc Pulper with either One or Two Disc
type is used for pulping of light cherry from the Pregrader.

McKinnon Aagaard pulping system can be configured into modular units of capacities from 2000 kgs to 4000
kgs of cherry intake per hour and can be Motor or Diesel Engine driven.

Technical Specifications

Description

Power required in HP

Engine required in BHP

Input Capacity Ripe Cherry in Kg/Hr

M/c Nett Weight in Kg.

Gross Weight in kg.

Shipping Volume in Cu. Mtrs

2 Disc Pulper Aagaard System

3

6

1800 – 2000

1000

1400

6.0

3 Disc Pulper Aagaard System

5

6

2700 – 3000

1100

1500

6.5

4 Disc Pulper Aagaard System

7

10

3600 – 4000

1300

1800

7.0

Specifications subject to change

Mucilage Remover - Vertical Type

Mucilage Remover - Vertical Type

McKinnon Vertical Washer is used for the removal of the sticky mucilage from the parchment covers. The
equipment can be used either after fermenting or Direct from the Pulper.

Operation: Wet parchment is fed into the inlet hopper flows tangentially to the screw
conveyor. Thereafter, through a spiral motion between finger like projections, the mucilage on the
parchment covers is getting removed.

Technical Specifications

Description

Power required in Hp

Input Capacity of Wet Parchment in kg / hr

M/c Nett weight in kg.

Gross weight in kg.

Shipping Volume in Cu. mtrs

Vertical Washer (VW – 1)

7.5

900-1000

625

775

2.25

Vertical Washer (VW – 2)

15

1800-2000

875

950

4.0

Specifications subject to change

Mucilage Remover - Horizontal Type

Mucilage Remover - Horizontal Type

The McKinnon Mucilage Remover is designed to mechanically remove mucilage from the parchment. The
mucilage
is rubbed off when the parchment coffee travels through the specially designed cylinder and is expelled
through a perforated steel cylinder casing. This casing is split into two halves, which can be hinged up
or
down for regular cleaning.

The machine contains the reception hopper with water arrangement, heavy duty cast iron cylinder, cast
iron
support legs, removable sheet metal cover, and an out-let control with weight adjusting levers and water
piping.

Technical Specifications

Description

Power required in Hp

Input Capacity of Wet Parchment in kg / hr

M/c Nett weight in kg.

Gross weight in kg.

Shipping Volume in Cu. mtrs

Washer

25

900-1000

900

1200

4.0

Mini Washer

7.5

350-450

525

650

2.1

Specifications subject to change

Rotary Dryer

McKinnon Rotary dryers can be used for drying both cherry and parchment coffee which yields a uniformly
dried products. It is available in different sizes / volumes from 1000 litres to 16000 litres. Even
though the dryers are designed to dry coffee products, it can be used to dry other products like chicory
and turmeric. (Subject to change of perforated screens according to the product)

The dryer consists of a drum which is mounted on two rigid frames, carries the product and rotates at a
constant speed, a hot air blower and a hot air generator. The hot air generator generates heat using
either fire wood or diesel depending upon the model opted by the customer.

It comes with an optional equipments : Silo with Elevator.
Silo is used for storing the product and Elevator is used for loading the product into Silo.

Technical Specifications

Description

Power Required in HP

Approximate weight / Batch (Parchment)

Drum Brake Motor

Blower Motor

Elevator Gear Motor

(Kgs)

1000 Litres

1.5

2

1

500 - 650

2000 Litres

2

2

1

1000 – 1300

4000 Litres

3

3

1

2000 – 2500

6000 Litres

5

3

1.5

3000 – 4000

8000 Litres

5

5

1.5

4000 – 5000

10000 Litres

5

5

2

5000 – 6000

16000 Litres

7.5

7.5

2

9000 - 10000

Specifications subject to change

Note : Weight / Batch is only a approximate value, and it will vary depends on the input material
(Parchment / cherry coffee) and moisture content of the product.

9” Smout Peeler-Polisher

Sample peeling can be carried out using Smout Peeler-Polisher. It can be used to determine the yield of
coffee bean from the Dry parchment (between 10.5% - 11.5% Moisture level) . This Peeler and polisher is
capable of handling 10 – 15 kg of green coffee per hour. Cone and Liner are made with Cast iron
material.
Also amount of polish can be adjusted as required.

Both manual, and motorised versions of Peeler-Polisher are available.

No.6 Africa Coffee Huller

Sample hulling of Dry Cherry can be carried out using this Huller, to determine the coffee bean yield.
The
capacity of this Huller is between 10-15 kg/hour of green coffee. Both manual and motorised versions of
Huller are available.

Sampling Catador

This closed circuit catador is used for segregation of good beans from the bulk coffee beans. This
segregation makes grading easier, faster, and more precise. The Sampling Catador also helps to determine
the
percentage of good beans, lights, broken beans, and shells present in the bulk coffee on a sampling
basis.
Its capacity ranges from 15 to 20 kgs/hour of green coffee.)

Mini lab Grader

The Mini Lab Grader is used for grading green coffee on five different sizes, by means of sieves. The
machine is provided with a linearly vibrating motor, and sieves made of perforated sheets. This machine
handles 1 to 20 kgs/hour of green coffee.

The sieves are used to analyse various grades in a sample of coffee beans. These sieves are available in
sizes conforming to both Indian Coffee Board, and International Standards (Screen Nos. 10 to 20). The
sieves
are built with a tolerance of +/- 0.05 mm. to maintain a high level of accuracy in grading.)

Pre cleaner with aspiration channel and magnet

McKinnon coffee pre cleaners are designed to clean and screen the coffee, effectively removing iron
particles, sand, rubble, and other unwanted materials.
Separation is achieved by a series of three screens - the first removing large impurities, the second
separating the coffee, and the third removing fine materials like sand and dust. An air sifter is
introduced for added efficiency. The machine requires minimum maintenance and its individual rubber ball
cleaning mechanism ensures maximum screening area at all times. The screen inclination, throw angle, and
amplitude varies depending on the input product for ideal result. The machine can be provided with a
closed aspiration system, or can be connected to a central aspiration line.
Capacity of machine ranges from 800kgs/hr to 5000kgs/hr, depending on input product characteristics.

Technical Specifications

Description

Power Required in HP

Input Capacity Kg / Hr

Machine Nett Weight in Kgs

Gross Weight in Kgs

Shipping Volume in Cu.Mtrs

Dry Cherry

Dry Parchment

Green Coffee

PST 3R

7.5

800 - 1200

1000 - 1500

1800 - 2100

720

1065

9

PST 7R

7.5

1700 – 2500

2000 – 3000

4200 - 5000

890

1430

11

Specifications subject to change

Dry Destoner with fan and cyclone

Mckinnon dry destoner are used for removing stones from Green coffee, dry parchment or dry cherry. The
destoner is designed to take advance of the different in specific weights between the stones and the
coffee.

The incoming coffee is fed in to on inclined sifting frame fitted with a special screen, which is
exposed to a controllable air exhaust. The lighter fraction consisting of good coffee, forms a fluid
layer above the sieve and flows over the outlet while the heavier stones contacting the screen are moved
upslope by the frame vibration. The sieve frame is vibrated through the use of a vibratory motor. The
machine has an input feed regulation device and an aspiration throat for connection to central
aspiration line or to an individual aspiration line with fan, cyclone, air lock and piping. The vacuum
above the sieve can be adjusted by a butterfly control valve. Depending upon the input material
characteristics, the feed, aspiration intensity, screen inclination, a throw angle setting and vibration
amplitude can be adjusted for optimum result.

The McKinnon dry destoners have capacities ranging from 600 Kgs per hour to 6000 Kgs per hour depending
on the input product characteristics.

Description

Power required in Hp

Input Capacity in Kg / Hr

Machine Nett Weight in Kg

Gross Weight in Kg

Shipping Volume in Cu.Mtrs.

Dry Cherry

Dry Parchment

Green Coffee

PVS 3

10

600 – 1000

800 – 1200

1800 – 2100

190

440

2.67

PVS 7

12.5

1600 – 2000

1400 – 2000

3200 – 4000

230

630

4.18

PVS 15

17.5

2200 – 4000

2800 – 4000

5000 – 6000

662

1000

6.5

Specifications subject to change

Africa Hullers

McKinnon Africa Hullers are specifically designed to process dry cherry. The machine consists of a
cylinder fitted with feeding and hulling ribs, enclosed in a strong casing, the lower portion of which
is perforated to allow the husks to pass into the husk chamber. The hulling is effected by means of the
triturating action between the hulling blade and the ribs on the cylinder. The cylinder at the feed end
is provided with a number of ribs set at an angle for facilitating the feed end and allowing the coffee
to proceed from one end of the cylinder to the other. At the delivery end there are three angular pieces
called lifters used for the purpose of lifting the coffee to the delivery spout. The shells and the dust
falling in the husk chamber are then blown out by the fan fitted in the feed end frame of the machine.
On larger size models the lower portion of the dust casing is hinged for cleaning purposes and to
facilitate changing of the screens. The feed and delivery spouts are fitted with regulators.

Technical Specifications

Description

Power required in HP

Output Capacity of Green Coffee in kg / hr

M/c Nett Weight in Kg

Gross Weight in kg

Shipping Volume in Cu.mtrs.

No.0

40

800-1000

1000

1300

5.0

No.1

25

400-500

800

965

4.0

No.2

15

200-250

480

575

2.5

No.5

5

75 – 125

240

305

1.75

No.6

1.5

10 – 15

75

110

1.5

No.6 (Hand Operated)

-

NA

65

100

0.5

Specifications subject to change

Capacities started subject to standard input requirements and may vary depending on actual operating
conditions.

Smout Peeler Polisher

McKinnon Smout Peeler Polishers are specially designed for processing of dry parchment coffee. The
machines can be used for peeling and polishing or for only polishing to remove the silver skin. Since
the Smout performs both peeling and polishing operations simultaneously, there is no necessity for
passing the parchment through a huller prior to polishing. This saves considerable energy and also from
damage to the coffee.

The Peeler Polisher is provided with an intake Hopper, Hopper Slide Gate for feed regulation, flanged
and sealed ball bearings, discharge spout with control door and a counter weight, suction fan and
aspiration piping and pulley suitable for Electric motor or Engine drive.

Output capacities range from 15 kgs. per hour to 2000 kgs of green coffee per hour. Models are available
for hand operation and sampling purposes. When the parchment is fed at the right moisture content (Ideal
moisture level between 10.5% - 11.0%) the machine produces green coffee without bean breakage and with
uniform polishing.

Technical Specifications

Description

Power Required in HP

Output Capacity of Green Coffee in kg

M/c Nett Weight in kg.

Gross Weight in kg.

Shipping Volume in Cu. Mtrs.

Smout Peeler Polisher 54”

40 + 5

1800 – 2000

1505

2250

6.0

Smout Peeler Polisher 42”

20 + 3

900 – 1000

850

1250

4.5

Smout Peeler Polisher 36”

10 + 1

450 – 500

535

800

4.0

Smout Peeler Polisher 28”

5+1

175 – 225

410

580

2.0

Smout Peeler Polisher 18”

3 + 1

75 – 100

200

300

2.0

Smout Peeler Polisher 15”

2.0

50 - 75

135

240

2.0

Smout Peeler Polisher 9”

1.0

10 – 15

75

115

1.0

Specifications subject to change

Closed Circuit Catador

Mckinnon Dustless closed circuit catadors are used for fine separation of heavy beans from light beans.
They also separate dust, shells, immature beans, stones and external matter from green coffee through
suitable adjustments in operating speeds and air quantities. They are particularly suitable for removing
beans which have been attacked by insects, or discoloured beans which are generally lighter than the
fully matured beans.

By nature of their closed air circuit, these catadors ensure a dust free operation and help in
preserving the factory environment. Catadors are used after hullers and smout peeler polishers to remove
husk and light coffee. They are also used after grading for seconday catadoring of light beans and
triage. The coffee is fed into an air current where separation is carried out by density differences and
the light matter is carried up and exited via the lights outlet. The heavy beans fall on a wire screen
and exit through the front of the machine.

The machine is equipped with an electric motor platform and a shaft extension to suit electric motor
drive or can be supplied to suit a diesel engine drive.

The recommended capacity is 1000 kgs. per hour with operating speeds varying for separation of stones,
separation of triage and separation of dust / chaff.

Technical Specifications

Description

Power required in HP

Input Capacity of Green Coffee in Kg

M/c Nett Weight in Kg

Gross Weight in Kg.

Shipping Volume in Cu.Mtrs

Dustless Catadors

3

900 – 1000

520

850

4.0

Specifications subject to change

Flat deck grader

McKinnon Flat Deck Grader is a vibrating deck with screens used for grading of coffee according to their
size.

We offer them in single and double deck versions based on the number of grades and capacity requirement.
Vibro Grading Machines can be used for grading coffee by virtue of their size.

The inclination of the screens, stroke and the angle of throw are adjustable, resulting in perfect and
uniform classification.

Large screens are provided with maximum number of holes to obtain high outputs.

Vibration of the screens is provided by means of vibratory motors mounted in the centre of the
machine.

The vibrating deck is mounted on four rubber springs thus ensuring that the vibrations of the machine
frame are reduced to a minimum.

The screens can easily be changed by swinging down the inlet door and sliding them out. A wide variety
of round holes and slotted screens of any size are available as per requirement.

The screen cleaning is automatic by means of rubber balls thus ensuring that maximum holes are available
at any time for proper grading.

A sighting glass is provided to enable continuous observation of the functioning of the machine.
Outlet spouts are provided with individual partitions and hooks for bagging.

Technical Specifications

Description

Power in HP

Input Capacity / Hour

Type

Single Deck

1.5 Hp

1000 kgs

Single Deck

2 Hp

2000 kgs

Double Deck

3 Hp

4000 Kgs

Specifications subject to change

Cylindrical grader

McKinnon Cylindrical Graders grades the coffee through a combination of wire and perforated screen
sections. The machine is modular in construction, and individual sections can be replaced, interchanged,
or redesigned. The type of coffee and amount of each grade determine the length of each modular section.
An internal spiral conveyor conveys the coffee along the cylinder in a very uniform manner. Cleaning
brushes ensure maximum screening at all times. All sections are made of perforated sheets when no
peaberry separation is required. The grader is configured with alternate wire and perforated sheets when
peaberry separation is required. The graders are provided with input hopper with slide feed regulation
device, individual outlet hoppers for each section, rails and hooks for bagging, and spouting for
further transport. Cylindrical Graders are suitable for Arabica and Robusta varieties.
Input capacities range from 200kgs per hour to 2000kgs per hour. Graders can be configured to give up to
nine separations, and with twin or triple deck for easy repass, and movement of coffee.

Technical Specifications

Description

No. of Decks

Power required in HP

Input Capacity of Green Coffee in kg.

M/c Nett Weight in kg.

Gross Weight in kg.

Shipping Volume in Cu. Mtrs

Cylindrical Grader 30”

1+2

4+5

1750-2000

4500

5500

48

Cylindrical Grader 30”

2

4

1250-1500

3000

4000

32

Cylindrical Grader 30”

1

3

750-1000

1500

2000

16

Cylindrical Grader 24”

2

3

750-1000

2000

2800

13

Cylindrical Grader 18”

2

2

300-500

1000

1500

10

Cylindrical Grader 12”

2

1

100-200

750

1250

8

Specifications subject to change

Densimetric Table (Gravity Table)

The McKinnon Gravity Tables are used after hullers and peeler polishers to separate heavy and light
beans. They can be used in conjunction with Closed Circuit Catadors for best results or even as an
alternate to Catadors.

McKinnon Gravity Tables, when adjusted well, effectively remove all triage besides providing coffee of
uniform weight. Ideally, best results can be achieved, if the coffee is graded, catadored and then
passed through these Tables. The Gravity Tables can be adjusted for throw and tilt in laterally and in
vertically.

A well designed fan and air distribution system, at the bottom of the machine, ensures even supply of
air. The machine is equipped with an input hopper with regulating device for feed control. Where
desired, a hood can be provided for dustless operation and suitable piping for connection to an
aspiration system (As an add on accessory). Separate discharge spouts for broken beans, lights and
heavies are provided for bagging or for further processing. Gravity Tables can be supplied with or
without feed Elevators. The coffee moves on an air cushion and due to the rocking motion and tilt of the
machine, the heavy particles move to one side of the machine for discharge. The light coffee and brokens
move further down the screen for discharge in front of the machine. Input capacities range from 150 kgs
to 3,000kgs per hour on Green Coffee input.

Technical Specifications

Model No

Power required in HP

Input Capacity of Green Coffee in kg

Deck Size (B x L) mm

No. of Blowers

GS 30

2

150 – 250

760 x 915

1

GS 50

5

500 – 750

760 X 1525

3

GS 80

7.5

800 – 1000

915 X 1830

4

GS 160

10

1750 – 2000

1065 X 2285

5

GS 240

15

2500 – 3000

1200 X 3000

7

Specifications subject to change

Sorting Tables

Mckinnon manual sorting tables are used after grading to remove blacks and unwanted beans from green
coffee. They are supplied with height adjustable stools to seat the pickers comfortably. Feed hopper has
a feed roller to ensure even feeding and distribution along the breadth of the belt. The belt is food
grade and ensures clear colour contrast with the bean to be picked. There are small pockets for the
pickers to place the removed defective beans. The speed of the belt can be varied by the garblers to
give optimum results. The length and breadth of the table can be varied to suit capacities desired.
Sorting tables give optimum results when used in conjunction with size graders, catadors, gravity tables
and electronic colour sorters.